Hello Phil, Wednesday, September 16, 2020, 7:40:24 PM, you wrote: PP> You can achieve this with a hybrid RAID1 by mixing SSDs and HDDs, and PP> marking the HDD members as --write-mostly, meaning most of the reads PP> will come from the faster SSDs retaining much of the speed advantage, PP> but you have the redundancy of both SSDs and HDDs in the array. PP> Read performance is not far off native write performance of the SSD, and PP> writes mostly cached / happen in the background so are not so noticeable PP> on a mail server anyway. very interesting. Do you or anybody else have experience with this setup? Any test results to compare? I will do some testing if nobody can come up with comparisons. best regards --- Michael Schumacher